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SIZING OF COLLOIDAL PARTICLES WITH LIGHT SCATTERING - CORRECTIONS FOR BEGINNING MULTIPLE SCANNING

机译:用光散射对胶体颗粒进行尺寸设定-多次扫描开始的校正

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摘要

Static light scattering is widely used for sizing of particles with radii in the range of 50 nm up to several micrometers. These experiments usually require very low particle concentrations (<10(-4)) for prevention of multiple scattering. As a consequence, nonabsorbing samples that are suited for light-scattering investigations must be transparent so that the transmittance of the incident light is typically above 95%. Investigations of less translucent samples require corrective terms for the beginning of multiple scattering to retrieve the particle-size distribution successfully. We applied a computationally convenient first-order approximation for the multiple-scattering problem that has Hartel's approach in its first steps. When incorporated into our inversion technique, this approximation functions well for samples with transmittances above 30%. We present examples of applications to experimental data. [References: 26]
机译:静态光散射被广泛用于对半径在50纳米至几微米范围内的粒子进行大小分级。这些实验通常需要非常低的颗粒浓度(<10(-4))以防止多重散射。因此,适用于光散射研究的非吸收性样品必须透明,以使入射光的透射率通常高于95%。半透明性较低的样品的研究需要多次散射开始时使用校正术语,才能成功恢复粒径分布。对于第一步采用Hartel方法的多重散射问题,我们应用了计算方便的一阶近似。如果将其纳入我们的反演技术中,则该近似值对于透射率高于30%的样品效果很好。我们提供了对实验数据的应用示例。 [参考:26]

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